Number 9 Geometry

Gaelic sun disc
Gaelic sun disc
CIRCLE = 360° = 9
03-sided polygon angles always add up to 180° = 9
Triangle total is half of a circle.
04-sided polygon angles always add up to 360° = 9
4-sided polygon is equal to a circle.
05-sided polygon angles always add up to 540° = 9
06-sided polygon angles always add up to 720° = 9
6 Lovers card 720
07-sided polygon angles always add up to 900° = 9
7 Chariot card 900
VIII - Tarot Strength08-sided polygon angles always add up to 1080° = 9
8 Strength card 1080
09-sided polygon angles always add up to 1260° = 9
10-sided polygon angles always add up to 1440° = 9
11-sided polygon angles always add up to 1620° = 9
12-sided polygon angles always add up to 1800° = 9
12 Hanged Man card 1800
13-sided polygon angles always add up to 1980° = 18 = 9
13 Death card 1980
14-sided polygon angles always add up to 2160° = 9
15-sided polygon angles always add up to 2340° = 9
15 Devil card 2340
16-sided polygon angles always add up to 2520° = 9
XVII - Tarot Star17-sided polygon angles always add up to 2700° = 9
17 Star card 2700
18-sided polygon angles always add up to 2880° = 18 = 9
18 Moon card 2880
19-sided polygon angles always add up to 3060° = 9
19 Sun card 3060
20-sided polygon angles always add up to 3240° = 9
20 Judgment card 3240
21-sided polygon angles always add up to 3420° = 9
21 World card 3420
22-sided polygon angles always add up to 3600° = 9
22 Fool card 3600 (Full Circle x 10)

Math source: Math Open Reference: Interior Angles of a Polygon

Winged Egyptian Sun Disc

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